[Amps] Dahl transformer BC plate transformer center-tap insulation?

Carl km1h at jeremy.mv.com
Fri Sep 2 07:43:57 PDT 2011

Dahl BC transformers often didnt have the same high reputation as the ham 
ones did. Ive heard of many shorting out rather soon direct from the 
Id do a hi pot before doing anything.


----- Original Message ----- 
From: "Jim Barber" <audioguy at q.com>
To: <Amps at contesting.com>
Sent: Thursday, September 01, 2011 4:47 PM
Subject: [Amps] Dahl transformer BC plate transformer center-tap insulation?

> ... resend, original didn't reflect for whatever reason.
> If you were looking at a Dahl plate transformer removed from a BC
> transmitter that had a center-tapped secondary, would you bet that the
> insulation would be good enough to use the transformer with a bridge
> instead of a full-wave rectifier, or would you assume that it isn't for
> safety's sake?
> I have no idea of the age of the transformer. It has the standard Dahl
> gloss black paint with red data plate, and the terminals are mounted on
> pinkish-red terminal boards.
> Thanks,
> Jim, N7CXI
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